I mean it's not like MATLAB where a company put in millions of dollars to make these libraries - the entire ecosystem was developed by open source contributors because they liked something about Python - sure, it's probably not as sophisticated as some of the other languages, but it has a low barrier of entry, it has users, and people developed libraries - in some cases because that's where users are and in many cases because it's the language they know!

You're thinking about the programmer effort put into making certain libraries efficient, but think about the users who are reaping the benefits of low barrier to entry! More people are coding, getting comfortable with the idea of programming, and we should welcome them!